regarding the 'data security' thread recently
linux.luser at myrealbox.com
Tue Jun 10 18:26:19 CEST 2008
On 10 Jun 2008, at 14:08, Benedikt Schindler wrote:
> Ilja O. schrieb:
>> About data wipe:
>> I was thinking -- doesn't eny SIM card have some kind of ID number?
>> And if they do, do we have software way to obtain it?
>> Phone could wipe itself if another SIM card is inserted AND upon SMS
>> message receiving.
> ... by the way : to what phonenumber will you send a sms when the
> has replaced the sim card?
This was my first reaction, too, and was just about to post to the
list and ask the same question when I realised the answer.
The new phonenumber doesn't matter, because it'll wipe the phone when
the thief's friend sends them a text message.
Having said that, why wait for an incoming text?
Why not just have the phone wipe itself when the SIM card changes?
You just need to store the original SIM ID in flash memory and check
against it at start-up. The software can add an additional function
for "change SIM card" which will allow the user to do so safely ("add
SIM card" is probably better - if it allows the phone to check
against a whitelist of multiple SIM cards then users can swap between
two tariffs easily, without having to worry about activating this
function EVERY time they do so).
The erasing of personal data can be done silently without alerting
the user (thief), and doesn't need to interfere with an additional
feature of "phoning home" its details in the event of theft <http://
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